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Unauthorized send tab to device

I've been using Firefox on device A computer in the evening, and the next day, after opening device B computer from sleep, a tab was open from the device A session (along… (read more)

I've been using Firefox on device A computer in the evening, and the next day, after opening device B computer from sleep, a tab was open from the device A session (along with some older tabs I kept open, it was placed at the most right location). I am 100% certain I did not have that tab open from previous session on B.

The only way this tab would be able to appear on device B is if I somehow triggered a "send tab to device" functionality when working on device A, however, I am 100% sure I did not. Seeing how I would have to right click the tab and select a submenu to trigger that, it seems essentially impossible that I did that by accident.

Q: 1. Is there a keyboard combo that could be accidentally hit that would trigger Send tab to device? As far as I could research, there is no such shortcut. 2. Can a website trigger this API and perhaps I approved it by accident? I would definitely also notice this. 3. Is there a sync audit log I could check on either device to see if a tab was synced? I found about:sync-log but nothing really useful in there.

This event is so weird that I am considering secirty aspects or a potential exploit vector..

Asked by anonymous1437 3 days ago

Logged into Firefox on new laptop, now Firefox on my desktop isn't saving cookies or history

I have been using Firefox for years on my Mac Mini and MacBook Pro, sync has never been a problem. Now I inherited a Dell laptop, after reinstalling Windows 11 I install… (read more)

I have been using Firefox for years on my Mac Mini and MacBook Pro, sync has never been a problem.

Now I inherited a Dell laptop, after reinstalling Windows 11 I installed Firefox and logged into my account as normal, and then switched back to using my Mac Mini. The next time I closed and then later reopened Firefox on the Mac Mini, Firefox had logged me out of every website, forgot my entire browsing history, passwords, bookmarks, everything. Its all gone with the exception of 4 of my 16 links on Firefox Home.

So I spent an hour fighting MFA, etc. on the websites I use the most, only to close Firefox and have it log me out and forget everything again. That is now its behavior, it loses everything every time I close the app. It does remember my toolbar settings, and those same 4 links on Firefox Home. i rebooted the computer and the problem remains.

Firefox is still logged into my account, it just doesn't sync or remember anything. Doesn't save cookies, history, nothing. Every time i relaunch the app, Firefox home is back in its default state

I also still have an instance of Firefox open on my MBP, I am now deathly afraid of closing the app for worry it will do the same. I also am afraid of using Firefox on the Windows computer, I absolutely cannot break this more.

How do I fix this this quickly and prevent it from ever happening again? I am getting absolutely buried in computer problems at every turn right now and nothing's getting solved. Every fix for weeks not only fails, but inevitably creates a new problem and I'm sorry but I'm going a little crazy and I really need a break.

Thank you.

Asked by VincentBrick 6 days ago